I'm using window 7, Samsung S3.
I connected my phone with PC and put songs and epub on my phone.
I just had unrecoverable error on the song folder and i couldn't delete file and put file.
somehow i deleted the troubled file after few shutdown and try (I still don't know how) but still I cant put file on my phone.
when i put file on my phone using PC it looks just same as normal but when i check the file with phone the file is gone. just same as before i put file.